I assume most nuclear weapons are larger and require larger aircraft to transport and drop. These would be smaller and considered a stealth missile, which would be carried by low detectibility aircraft.

Logout, reboot the device and log back in. That's what fixed it for me.

The Pelant character is where they lost me too. I think the last episode I watched the rich bug guy had to choose between stopping Pelant from draining his bank accounts or saving a school full of children from a drone strike. It was so ridic.